- Gadwall
- Galah
- Garganey
- Gentoo Penguin
- Giant Coua
- Glaucous Gull
- Glossy Ibis
- Goldcrest
- Golden-breasted Starling
- Golden-headed Quetzal
- Golden Eagle
- Golden Parakeet
- Golden Pheasant
- Golden Tanager
- Gouldian Finch
- Great Argus
- Great Black-backed Gull
- Great Cormorant
- Great Crested Grebe
- Great Cuckoo-Dove
- Great Curassow
- Great Egret
- Great Green Macaw
- Great Grey Owl
- Great Grey Shrike
- Great Hornbill
- Great Horned Owl
- Great Skua
- Great Spotted Cuckoo
- Great Spotted Woodpecker
- Great Tit
- Great White Pelican
- Greater Blue-eared Starling
- Greater Flamingo
- Greater Rhea
- Greater Roadrunner
- Greater Scaup
- Greater Vasa Parrot
- Greater White-fronted Goose
- Green-tailed Trainbearer
- Green Aracari
- Green Sandpiper
- Green Wood Hoopoe
- Grey-crowned Rosy Finch
- Grey-headed Bushshrike
- Grey-headed Chickadee
- Grey-headed Gull
- Grey Crowned Crane
- Grey Heron
- Grey Jay
- Grey Parrot
- Grey Partridge
- Grey Plover
- Grey Wagtail
- Greylag Goose
- Griffon Vulture
- Grosbeak Starling
- Guanay Cormorant
- Guianan Cock-of-the-rock
- Guianan Toucanet
- Guira Cuckoo